Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 110: Superconductivity: Fe-based Superconductors - 1111 and Others

TT 110.6: Vortrag

Freitag, 16. März 2018, 11:00–11:15, H 3010

FeSi: a new building block for iron-based superconductivity — •Andres Cano — CNRS, France

We report the synthesis and characterization of the novel silicide hrydride LaFeSiH displaying superconductivity with onset at 11 K. We find that this pnictogen-free compound is isostructural to LaFeAsO, with a similar low-temperature tetragonal to orthorhombic distortion. Using density functional theory we show that this system is also a multiband metal in which the orthorhombic distortion is likely related to single-stripe antiferromagnetic order. Electrical resistivity and magnetic susceptibility measurements reveal that these features occur side-by-side with superconductivity, which is suppressed by external pressure.
F. Bernardini, G. Garbarino, A. Sulpice, M. Núñez-Regueiro, E. Gaudin, B. Chevalier, A. Cano, S. Tencé; arXiv:1701.05010